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Four-wheel independent drive electric vehicle control method and system

A four-wheel independent drive, electric vehicle technology, applied in electric vehicles, control drives, control devices, etc., can solve the problem of meeting the driver's driving expectations, the single control strategy of four-wheel independent drive electric vehicles, and the inability to effectively improve vehicle safety, etc. problems, to achieve the effect of improving stability and coordinating distribution optimization

Active Publication Date: 2020-06-26
CHANGZHOU INST OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problem that the four-wheel independent drive electric vehicle has a single control strategy, cannot meet the driving expectations of the driver under all working conditions, and cannot effectively improve the safety of the vehicle, the present invention proposes a control method based on four-wheel independent drive electric vehicles and its Method to realize

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  • Four-wheel independent drive electric vehicle control method and system
  • Four-wheel independent drive electric vehicle control method and system
  • Four-wheel independent drive electric vehicle control method and system

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Embodiment Construction

[0032] The embodiments of the present invention will be described in detail below in conjunction with the drawings.

[0033] The present invention provides a four-wheel independent drive electric vehicle control, see figure 1 , Specifically, the control system of the four-wheel independent drive electric vehicle includes the following modules:

[0034] The fault detection module is used to obtain vehicle driving environment information, vehicle operating status information and actuator failure information;

[0035] Body posture tracking module, used to track the driver's desired driving state;

[0036] Working condition conversion control module, used to switch vehicle driving conditions and control algorithms;

[0037] The driving torque coordination distribution module is used to calculate the expected torque required by the vehicle under the condition of actuator failure and optimize the torque distribution;

[0038] The motor control module is used to control the driving motor and th...

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Abstract

The invention discloses a four-wheel independent drive electric vehicle control method and system. The method comprises the steps of acquiring the vehicle driving environment information, the vehiclerunning state information and driver driving expectation information; tracking a vehicle body attitude; switching vehicle working conditions according to the upper-layer module information; calculating a vehicle expected longitudinal moment, a transverse moment and a yawing moment which meet the driver expectation; optimally distributing the moment of the vehicle; and an armature voltage signal required by the output torque of the motor is generated to control the motor. According to the invention, the driving process of the vehicle is divided into several independent driving working conditions; operation and control under multiple driving working conditions are not limited to a single control strategy in a global range; according to the method, the driving torque is converted into coordinated switching between the multiple control modes and the multiple control strategies, coordinated distribution of the driving torque in the vehicle driving process is optimized while the driving expectation of a driver is met, and the stability, operability and safety of vehicle driving are improved.

Description

Technical field [0001] The invention relates to the field of electric drive vehicle control, and in particular to a control method and system for a four-wheel independent drive electric vehicle. Background technique [0002] With the intensification of environmental problems and energy crisis, new energy vehicles have ushered in unprecedented development opportunities. Four-wheel independent drive electric vehicles are one of the research hotspots. The four-wheel independent drive electric vehicle has two steering motors and four drive motors. The structure is simple and easy to control. The number of actuators is obviously greater than its degree of freedom, and the vehicle has a huge potential for controllability. The existing four-wheel independent drive electric vehicle has a single control method, and cannot effectively control the body posture when the vehicle actuator fails, meet the driving expectations of the driver, and greatly reduce the maneuverability and safety of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/182B60L15/20
CPCB60W30/182B60L15/20B60W2710/083B60L2240/423Y02T10/72B60K7/0007B60W10/08B60W50/0205B60W2050/022B60W2050/021B60W50/029B60W2050/0292B60W30/02B60W2540/10B60W2540/18B60W2720/40B60W10/20B60W2555/00B60W10/119B60W30/188B60W50/0225B60W2520/26
Inventor 赵景波陈杰
Owner CHANGZHOU INST OF TECH
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